IEC 60651 Replaced
IEC 60651:1979/AMD1:1993
Amendment 1 - Sound level meters
Contains changes to the clauses of IEC 651 and a new appendix D with
equations for design-goal frequency weightings.
equations for design-goal frequency weightings.
CHFÂ 20.-
This publication has been replaced by:
IEC 61672-2:2003
IEC 61672-1:2002